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Volume 19 No 2 (2021)
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AUTO-COMBUSTION SYNTHESIZED Ni (Mg, Cu, Co) Fe2O4 FOR IMPEDANCE AND GAS SENSING STUDIES
Rajesha Shetty G, Shilpa S, Raviraja S, L. N Shubha, S. Abdul Khader, Asiya Parveez
Abstract
This article presents the impedance and magnetic studies of divalent metal ions doped nickel ferrite. Divalent metal ions such as Mg+2, Cu+2 and Co+2 were substituted in pure Nickel ferrite (NiFe2O4) with the basic composition Ni0.5M0.5Fe2O4 (here, M= Mg+2, Cu+2 and Co+2), which were synthesized by auto-combustion method using, nitrate-citrate method. Synthesized samples were sintered at 9500C and investigated for various properties. Phase of the synthesized samples were probed by X-ray diffraction (XRD) studies. Peaks observed in the XRD spectrum confirms the single phase spinel cubic structure for the divalent metal ions substituted NiFe2O4. Using FESEM, surface morphology of the samples has been investigated. Composition and frequency dependent dielectric and impedance properties were studied using HIOKI make LCR meter model 3520-50 from 20 Hz to 5 MHz. For the proposed nano-powder samples gas sensing measurements were done at RT to sense NO2.
Keywords
Impedance; Phase; Nano-powders; Sensing; Precursors.
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